iGoogle小工具必须主动实现调整大小，所以我猜在跨域模型中，如果没有远程内容以某种方式参与，你就无法做到这一点。如果您的内容可以使用典型的跨域通信技术将具有新大小的消息发送到容器页面，那么其余部分就很简单了。

可能有点晚了，因为所有其他的答案都是老的:-)但是…这是我的解决方案。在实际FF, Chrome和Safari 5.0测试。

css:

iframe {border:0; overflow:hidden;}

javascript:

$(document).ready(function(){
    $("iframe").load( function () {
        var c = (this.contentWindow || this.contentDocument);
        if (c.document) d = c.document;
        var ih = $(d).outerHeight();
        var iw = $(d).outerWidth();
        $(this).css({
            height: ih,
            width: iw
        });
    });
});

希望这对大家有所帮助。

This is slightly tricky as you have to know when the iframe page has loaded, which is difficuly when you're not in control of its content. Its possible to add an onload handler to the iframe, but I've tried this in the past and it has vastly different behaviour across browsers (not guess who's the most annoying...). You'd probably have to add a function to the iframe page that performs the resize and inject some script into the content that either listens to load events or resize events, which then calls the previous function. I'm thinking add a function to the page since you want to make sure its secure, but I have no idea how easy it will be to do.

获取iframe内容高度，然后将其赋给这个iframe

 var iframes = document.getElementsByTagName("iframe");
 for(var i = 0, len = iframes.length; i<len; i++){
      window.frames[i].onload = function(_i){
           return function(){
                     iframes[_i].style.height = window.frames[_i].document.body.scrollHeight + "px";
                     }
      }(i);
 }

使用jQuery的最简单方法:

$("iframe")
.attr({"scrolling": "no", "src":"http://www.someotherlink.com/"})
.load(function() {
    $(this).css("height", $(this).contents().height() + "px");
});

iGoogle小工具必须主动实现调整大小，所以我猜在跨域模型中，如果没有远程内容以某种方式参与，你就无法做到这一点。如果您的内容可以使用典型的跨域通信技术将具有新大小的消息发送到容器页面，那么其余部分就很简单了。